﻿// Copyright (c) Matthias Koch
//
// See the NOTICE file distributed with this work for additional information
// regarding copyright ownership.  rubicon licenses this file to you under 
// the Apache License, Version 2.0 (the "License"); you may not use this 
// file except in compliance with the License.  You may obtain a copy of the 
// License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software 
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the 
// License for the specific language governing permissions and limitations
// under the License.
// 
using System;
using System.Collections.Generic;
using System.Linq;

using XValidation.Exceptions;

namespace XValidation.Validations
{
  public class CompositeValidation : IValidation
  {
    private readonly IEnumerable<IValidation> _validations;

    public CompositeValidation (IEnumerable<IValidation> validations)
    {
      _validations = validations;
    }

    public virtual void Validate (object value, string paramName, IValidationContext context)
    {
      var failed = new List<IValidation>();

      foreach (var validation in _validations)
      {
        try
        {
          validation.Validate (value, paramName, context);
        }
        catch (ValidationException)
        {
          failed.Add (validation);
        }
      }

      if (failed.Count > 0)
        throw new CompositeValidationException (failed, paramName);
    }

    public override string ToString ()
    {
      return base.ToString() + "(" + string.Join (", ", _validations.AsEnumerable()) + ")";
    }
  }
}